Microsoft doesn't get to own the world Copilot for everything.
In the USA, being sued is 99% of the punishment, losing the suit does not really matter. Especially when faced with a big corp like this.
You should think about what might get you in legal trouble, whether you might prevail is not relevant to your bottom line unless you are a Fortune 500 yourself.
Not for everything, but for AI assistants they conceivably could.